STMicroelectronics Battery charger demonstration board with integrated power switch for Li-ION/Li-POLYMER based on the L6924D STMicroelectr STEVAL-ISA076V1 Data Sheet

   

   

   

For further information contact your local STMicroelectronics sales office.

May 2011

Doc ID 18119 Rev 2

1/4

4

Battery charger demonstration board with integrated power switch

for Li-Ion/Li-Polymer batteries based on the L6924D

■

Operating input voltage up to 12 V 

■

Fully integrated solution with power MOSFET, 
reverse blocking diode, sense resistor, and 
thermal control 

■

Both linear and quasi-pulse operation 

■

Programmable charge current both in fast 
charge (up to 1 A) and in pre-charge mode 

■

Selectable 4.1 V and 4.2 V output voltage (±1% 
accuracy) 

■

Programmable termination current 

■

Programmable pre-charge mode voltage 
threshold  

■

Programmable charge timer 

■

Multifunction pin for flexible charge process 
termination 

■

Status outputs to drive LEDs or host processor 
interface 

■

Battery absence detection 

■

Closed loop thermal control 

■

NTC or PTC thermistor interface for battery 
temperature monitoring and protection 

■

RoHS compliant

The STEVAL-ISA076V1 demonstration board is 
based on the L6924D battery charger system with 
integrated power switch. The L6924D device is a 
fully monolithic battery charger dedicated to 
single-cell lithium-ion polymer (Li-Pol) battery 
packs, and is the ideal solution for space-limited 
applications such as PDAs, handheld equipment, 
cellular phones, and digital cameras.

When an external voltage-regulated wall adapter 
is used, the L6924D works in linear mode, and 
charges the battery using a constant 
current/constant voltage (CC/CV) profile.

When a current-limited adapter is used, the 
device can operate in quasi-pulse mode, 
dramatically reducing power dissipation.